Editor's note: Netflix's new docuseries "Tiger King" takes viewers into the strange world of big cat collectors. Featuring eccentric characters with names like Joe Exotic and Bhagavan "Doc" Antle, the series touches on polygamy, addiction and personality cults, while exploring a mysterious disappearance and a murder-for-hire.

To Allison Skidmore, a PhD candidate at the University of California, Santa Cruz, who studies wildlife trafficking, the documentary failed to take advantage of an opportunity to bring attention to the scourge of captive big cats.

A former park ranger, Skidmore first started studying the issue in the U.S. after the infamous death of Cecil the Lion in Zimbabwe in 2015. She was shocked to learn about how little oversight there was stateside. We asked her about the legality, incentives and ease of buying and selling tigers.

1. How many captive tigers are in the U.S.?

Unfortunately, there's no straightforward answer. The vast majority of captive tigers are crossbred hybrids, so they aren't identified as members of one of the six tiger subspecies - the Bengal tiger, Amur tiger, South China tiger, Sumatran tiger, Indochinese tiger and Malayan tiger. Instead, they're classified as "generic."

Less than 5% - or fewer than 350 - of tigers in captivity are managed through the Association of Zoos and Aquariums, a nonprofit organization that serves as an accrediting body in the U.S. They ensure accredited facilities meet higher standards of animal care than required by law.

All the rest are privately owned tigers, meaning they don't belong to one of the Association of Zoos and Aquariums' 236 sponsored institutions. These are considered generic and fall outside of federal oversight.

There's no legal requirement to register these generic tigers, nor a comprehensive national database to track and monitor them. The best educated guess puts the number of tigers at around 10,000 in the U.S. Estimates put the global captive tiger population as high as 25,000.

Only pure-bred tigers that are one of the six definitive subspecies are accounted for; these are the tigers you see in places like the Smithsonian National Zoo and generally belong to the Species Survival Plan, a captive breeding program designed to regulate the exchange of specific endangered species between member zoos in order to maintain genetic diversity.

The U.S. is plagued with complicated and vague laws concerning tiger ownership.

However, there are no federal statutes or regulations that expressly forbid private ownership of tigers. State and local jurisdictions have been given this authority, and some do pass bans or require permits. Thirty-two states have bans or partial bans, and 14 states allow ownership with a simple license or permit. Four states - Alabama, Wisconsin, North Carolina and Nevada - have no form of oversight or regulation at all.

An overarching, cohesive framework of regulations is missing, and even in states that ban private ownership, there are loopholes. For example, in all but three states, owners can apply for what's called a "federal exhibitor license," which is remarkably cheap and easy to obtain and circumvents any stricter state or local laws in place.

You now need a permit to transport tigers across state lines, but there's still no permit required for intra-state travel.

4. What's in it for the owners?

Some see it as a business venture, while others claim they care about conservation. I consider the latter reason insincere.

Ultimately, tigers are big money makers, especially tiger cubs. The Animal Welfare Act allows cub petting from eight to 12 weeks of age. People pay $100 to $700 to pet, bottle-feed, swim with or take a photo with a cub.

None of these profits go toward the conservation of wild tigers, and this small window of opportunity for direct public contact means that exhibitors must continually breed tigers to maintain a constant supply of cubs.

The value of cubs declines significantly after 12 weeks. Where do all these surplus tigers go? Unfortunately, due to a lack of regulatory oversight, it's hard to know.

Posing with tigers on social media platforms like Instagram and on dating apps has become a huge problem. Not only can it create a health and safety risk for both the human and tiger, but it also fosters a false narrative.

If you see thousands of photos of people with captive tigers, it masks the true problem of endangered tigers in the wild. Some might wonder whether tigers are really so endangered if they're so easy to pose with.

The reality of the wild tiger's plight has become masked behind the pomp and pageantry of social media. This marginalizes meaningful ideas about conservation and the true status of tigers as one of the most endangered big cats.